US1877161A - Mechanism for reversing motive devices for operating doors and the like - Google Patents

Description

Sept. 1-3, 1932. R. D. CONKLIN 1,877,161 MECHANISM FOR REVERSING M OTIVE DEVICES FOR OPERATING DOORS AND THE LIKE 2- Sheets-Sheet 1 Original Filed June 7, 1929 3140044 601. Rosana Q ConK/in.

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MECHANISM FOR REVERSING MOTIVE DEVICES FOR OPERATING DOORS AND THE LIKE Original Filed June '7. 1929 2 Sheets-Sheet 2 gum/mica Roscoe 0 ConKl/n 3513/ 5 Gwyn W136 Patented Sept. 1 3, 1932 owner.

oo'ivirAnY, 01' NEW YORK, N. Y., A ooRro'FLA'TIoN or virrisr mar in;

ma nesia 1 6i; R vERsING MOTIVE DEVICES F0155 oPERZi'TiNG nooit's tinii L'I'iifi original ep pliceition filed June 1828, Serial n $9,205, now retentive; 1,828,860, i tea octo'bei 2'7,'1'931".

Divided and this application filed May 24, 1980. semi No. 455,264.

v p -I.-.; q 1 This lnvention relates in, general E appe;

retus for use in conjunction withlniotive .oie-

vices for operating doors, gates and the like ;;by means o fwhich the motive devices and the doors are reversed in direction of movement when they strike an object in their path;

One of the objects of thisinventi'on is the provision of relatively siihpie mechanism of the above nature for use in connection with 1d movable doors and their 0 eratin mechanisni'which is simple and rugged in construction and adeptedt'o easy andrap d Inenufacture and, easy repair and repl'z cen'ientj v A further eljject of this invention is the" provision of reversing mechan sm for RS611;

connection all typejs' o'f door operating motors, such as the pneumatic and electrical types.

connecting niechtlnisin het ween the motive device a'nd' the door Wl1lCi1 lS arranged to he closed upon' the door striking an obstruction Mtoefl'ect' a reversal in movement of 23 ating mechanism.

the oper- The se" andotherobjects sswiuappeer from the following disclosiire are successfnliy at 8% June 7, 1929.

Referringto the drawings which have'lieen given n an illustrative sense- 1 Figure 1 isa side elevatlonal. View of one form of device for ticc'oin lishiiw the urposes of this invention;

Fig. 2 is a cross-sectional view taken onthe linej2'2 o fF g.1;- V V Fig. 3 is a side elevational view of modified form of device for accomplishing the same results;

get is an elevation'al view of another form of the device as applied to the connec ing'link to be employed between the motive device and the door; V

" the .door. to effects revei sgz l hoven ei ix A' further objectlolf he invention is the provision ofa switch cooperating With the g This invention resides stllostanti'zilly in thec. f l 7 combination, construction, arrangement and Fig. 5 is another view of the mechanism of a a -'1.1 :J L); tin: a: ;l. 1 i e. 4 wit m y pei'tsibr kse mm. sh w ns r w hwest i ie en le per eithe mechanisn for operetin it, which; part is em Q h i e Q QQi FQ-AK MW & i i e rem eti esse iati he, elements QmP i iPgihie in emi nw-i r The Inost tenernllx lrn'ovvn g nd ised of reversing inechanisini fonpovver o iereted e si s e iip lie ,l e-m leyw e i I, or collapsible shoev onsthe. forwa rd edge ojj the moving door which is deformedor co l; lapsed When the Q oor strikes .a n hiec t ttS to close a; switch or ,control hng @e nected to the Iiiotivede vice for t thereof. The present inye'ntioli hes ft'odo vyit several forms or. devices hy nieeiis" of simil'ar res1ilts are Secured withoiit necessity of employing afi'exihle' or collapsible fhqiey onthe forward" edge of the bog; ,To' understand the structure o invention reference Will be med e' tog ,Beferring toFig; 11', the for in ofdeviced sclosed therein.coniiprises a; notor shown generally atl', oftlieldi'iferenti-al typg Aftthis perm itjmightjbe m h s 'zed twee s" principles, of this iriventigliflare 'ri ot, re strigterlf to the form ofniotive device, whether-lit be; pneuinatic or electrigfaiiid thedisclosure the drawings is only'given to-lill iistrete the prinoiples'of the inv ntipiii The pn umatic motor 1 is. shown ,cfomprising e, large; and a} 'sniiell cylinder 2 end 3,,aiid. the pistehv rodit'f extending beyond the end" ojche,;s'mt11 r'p 1 inden The pneumatic motor 1 on a base plate 5 which in 'turnz'issnpported by. a. supporting plate 6 extending through portion of the lllgth thereof on eg ch side, the flanges 7 comprising marten pa 'horizontal portionQ These flanges enclose the fee; I

edges of the ,besepleitei5iinemanner so the base plate ,niotor supported thereon may. slide longitiidinztlly of thei plate ,6 guided by the flengesil Supported. on

- one end of theibaselplaiteieis a" bracketBgto i which is secured the vertical arrnfl andgthe horizontal pin 10. The tr ee end of the lpinl '10 extends through the bracket 12,:secnred to I thesupporting plate e". Theipin 10 is 811?;

circled by means of a, heavy spring 11 which Ice lies between the bracket 12 and the arm 9. Secured. to the upper end of arm 9 is a pin 1.3 having a reduced portion 14 on which is slidably mounted a contact disc 17 supported between the insulating members 16 and by means of which the disc is insulated from the portion 14. A spring 15 is mounted between the insulatingmembers 16 and the contact disc 17 which are arranged to slidably move as a unit on the reduced portion 14 against the action of the spring 15 and the shoulder on the pin 13. Supported on a bracket 19 is a block of insulating material 18 which in turn supports the fixed contacts 20 which are arranged to be bridged by the contact disc 17 The piston rod 4 is, of course, intended to be connected by any suitable connecting link to the doors and the like to be operated by the motive device. The supporting plate 6' is provided with a'stop pin 22 against which the base plate 5 is forced by means of the heavy spring 11 reacting on the fixed bracket 12. The pipe 21 is provided for supplying fluid pressure to the larger cylinder 2 of the motor 1. The operation of the device will be described later in connection the motive device. gages the connecting member 25 and s held with Fig. 6.

The modified form of device shown in Fig. 3 comprises, as before, the pneumatic motor 1 having the piston rod 4. Pivotally' secured .to the piston rod 4 by the arms 26 of the connecting member 25 is a short shaft 27 which threadedly engages the connecting member 25 and is held in adjusted position by means of the lock nut 28. Two lock nuts 29 are also mounted on the shaft 27 against which presses the hollow sleeve 30. The end of the shaft 27 is provided with an enlarged portion 31 which acts as a stop for the plate 33 which encircles the shaft27 and is forced against the portion 31 by means of the spring 32. Theshaft 27 is provided with a reduced cylindrical portion on which is slidably mounted and from which is insulated the contact disc 17. A spring 41 resiliently resists movement of the contact disc 17. A framework 34 is secured to the plate 33 and has supported thereon and insulated therefrom the contacts 20 adapted to be bridged by the contact disc 17. A shaft 35 threadedly engages the framework 34 and is held in adjusted position by means of the lock nut .36. The shaft 35 is adapted to be secured to the doors which are to be operated. The operation of this device will be described in connection with Fig. 6;

Another form of the device is shown in Figs; 4 and 5. Thereversing switch in this case, as in the case of the form shown in Fig. 3, comprises a portion of the connecting link to be inserted between the motive device and 1 the door. As before, the connecting member 25 is provided with the arms 26 which are to be pivotally connected to the piston rod of A shaft threadedly en gated slot 49. Secured to the shaft is 4 another block 53 which is held in place by means of the lock nut- 54. A heavy spring lies between the blocks 48 and 53. The other end of shaft 50'is provided with the connecting member 55 which is held in place by means of the lock nut 56 and is adapted to connect the mechanism to the door to be operated. Pivotally supported on the block 53 is an arm 57 which is provided at its outer end with a pair of rollers 59 and a downward projection 60. A. spring 58 forces the arm 57 upwardly so that the rollers 59 engage the cam surface 61 of the block 48. Adjacent this mechanism is a supporting plate 62 on which are secured the spaced brackets 63 in which is mounted a shaft 64 for pivotaily supporting the plate 66. i the plate 66 is urged upwardly by means of a spring 71 against the fixed stop 65. The plate 66 is provided with the extension 6'? on which is secured the short pin T2 for slidably supporting the contact disc 17 which is insulated therefrom. The spring 73 resiliently resists movement of the contact disc 17. Also secured to the supporting plate 62 is a block of insulating material 70 to which is secured the spaced contacts 20 bridged. by the contact disc 17. The operation of this form of the device will be described in connection with Fig. 6.

The diagrammatic showing in Fig. 6 illustrates the association of the elements of this invention. A wire 89 extends'in the positive side of the current source to the push button switch 80. One terminal of this switch is connected by wires 81 and 82 to one terminal of the electro-magnetically operated fluid pressure valve 83. This fluid pressure valve is of a well known type extensively used in this art and when energized operates to permit the admission of fluid pressure through the pipe 84 and pipe 21 into the largest cylinder of the motive device 1. The other termi' nal of the winding of this valve is grounded as at 84. Wire 81 also connects to one con tact 20 and the other contact 20 is connected to wire 85. At 86 is shown diagrammatically a switch adapted to be mounted in the path of the door so as to be moved into the position shown in the figure just as the door closes so that the conducting strip 87 thereon moves out between the fixed contacts, one of which As shown in Fig. 5'

v To open the doors switch 80 is closed. Cur

i, smrca For sake of clarity, although it is well known in the art, it may be pointed out that the differential type of motor as shown here is always supplied in the smaller cylinder with fluid pressure. When fluid pressure is supplied to the larger cylinder the force exerted in the smaller cylinder is overcome and the motor operates to open the doors. To supply this fluid pressure to the larger cylinder the magnet valve 83 when energized connects the larger cylinder to the fluid pressure source through itself and the pipes 21 and 84. Thus to fully open the doors switch must be held closed and kept closed in order to maintain the doors opened. As soon as switch 80 is opened magnet valve 83 becomes deenergized and permits the fluid pres sure in the larger cylinder to exhaust to the atmosphere through the valve. The force exerted in the smaller cylinder then acts to close the doors. With this general discussion it is believed that the operation of the device, as now described, will be more fully understood.

In the arrangementshown in Fig. 1 when fluid pressure is supplied to the larger cylinder through the pipe 21 piston rod 1 begins to move to the right and carries with it the door which is connected thereto. The strength of spring 11 is such that it is able to resist all the normal reactions caused by the operation of the door and hence the motor 1, which is slidably supported on the supporting plate 6, does not move. As soon, however, as the door strikes an obstruction the motor tending to move the door on being unsuccessful will move to the left in Fig. 1 sliding on the supporting plate 6 and compressing spring 11.

The motor will continue to move carrying the arm 9 with it until the lower end of the arm strikes the fixed bracket 12. By this time contact disc 17 will have bridged the fixed contacts 20. As soon as the obstruction is removed spring 11 is strong enough to force the motor back so that the plate 5 strikes the stop 22 and the door continues to close until fully closed. The motor will, of course, 1

continue to exert a force so that the motor will again move to the left until stopped by compressing spring 11. Contacts 20 will again be bridged but produce noreversing action since just as the door completes its closing stroke and before contact 17 bridges contacts 20 theswitch 86 (Fig. 6) will have been moved by the door so that contact 87 moves out from between the fixed contacts breaking the circuit which includes the contacts 20. This operation will be described a little more in detail in connection with Fig. 6.

rentthen flows through wire 89, switch 80, wire 81, wire 82 through the magnet valve and wire 84; to ground. The magnet valve is energizedto permit the delivery of fluid pressure to the larger cylinder of the motor The door then begins-to open and continues to open to fully opened position and remains opened as long asswitch SOisclosed; As soon as switch 80' is opened the larger cylinder of motor 1 opens toexhaust and the door begins to close. Should it strikean obstruction con"- tact disc 17' willbridge contacts 20 as de-' scribed above and current will flow through wire 89, Wire 88, contact 87, wire 85, contact 20, contact disc '17, contact 20, wire 81, wire 82',- inagn'et valve 83 azndtoground at 84: The door wi 1 then begin to open-and'continue toopen until theobstruct-ion is removed. It might be pointed out here that switch86,- of course, moves as soon as the door begins to open to a position where contact 87 bridges the fixed contacts.

' The-niechanism in Fig.3is, as illustrated, interposed between the piston rod 4 and the door. Thus during closing should the door strike an obstruction'it is held against move ment and withit rod 35 and bracket 34. The notor continuing to operate forces shaft 27 to the right against the actionof spring 32 until contact disc '17 bridges contacts 20 when the circuits will be completed as before to reverse the direction of movement of the motor. As before, spring 32 which corre sponds to sprin'gll in the arrangement of F 1 is of suflicientstrengtl r to prevent rela tivemovement between shaft 27 and-bracket 3t under normal operating conditions. this formof mechanism, as in the first one described, a door switch 86 is of course employed. With the arrangement ofFig. 3, the

wires connecting the contacts 20 must, of

course, be flexible leads since this part of the mechanism must move backwards and for Wards. The arrangementin Fig; 1 of course does not require flexible leads nor does the arrangement shown in Figs. and

The arrangement in Figs. 4a and 5operates as follows: The mechanism ofFig; 4 is connected between the piston rod of the motor and the door to be operated. As the door closes spring 52 is strong enough to prevent relativemovement between" blocks 18 and 53. When the door strikes an obstruction, however, it as well as block '53 and the mechanism connected thereto, is held against movement. Since the motor continues totend to move forward it will overcome the resistance of spring 52 and block 48 will be moved to the right. Its cam surface 61 acting on the rollers 59 will cause arm 57 to move downwardly so that the projection 60 strikes the plate 66. This causes plate 66 to move downwardly (Fig. 5) carrying with it arm 67, pin 72 and contact disc 17 to a point where the contact disc bridges the fixed contacts 20. Circuits are then complete, as described before, to reverse the direction of movement of the motor. In this form of device the door switch 86 may be eliminated because when the door is completely closed the link which connects it, as shown in Fig. 4, with the motor is moved sufficiently to the right so that the projection 60 of arm 57 has passed the rounded end 68 of plate 66. Thus, even though the arm 57 is moved downwardly as block 48 moves towards block 53, the door being closed, it does not act upon plate 66 and hence contacts 20 are not bridged. During the opening movement of the door the end of plate 66 is turned d0wnwardly, as shown at 68, so that the end 60 of the arm 57 may pass the end of the plate without striking it.

From the foregoing disclosure it will be a; apparent that I have disclosed an exceedingly simple and yet rugged and eificient mechanism for carrying out the principles of this invention which employs certain principles of construction and operatlon. I am, of

*i course, aware that these principles may be embodied in other forms of the device and I do not, therefore, desire to be strictly limited to the disclosure as given for purposes of illustration but rather to the scope of the inven- 'tion as it is defined below.

What I seek to secure by United States Letters Patent is:

1. In a door operating apparatus in combination with a motive device, of a link for connecting the motive device with the object to be operated, the link comprising two relatively movable members, means for resisting relative movement of the members, a cam element attached to one of the members and en- 2 gaging a cam surface formed on the other member and a control device operated by the cam element when the reaction on the motor through the link exceeds a predetermined value.

2. In a door operating apparatus in combination with a motive device, of a link for connecting the motive device with the object to be operated, the link comprising two relatively movable members, means for resisting relative movement of the members, a cam element attached to one of the members and engaging a cam surface formed on the other member and a control device operated by the cam element for reversing the motive device.

In testimony whereof I have hereunto set my hand on this 15th day of May A. D., 1930.

ROSCOE D. CONKLIN.

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